| Finnish: Tammisalo | |
| Other Name: | Swedish: Tammelund |
| Settlement Type: | Helsinki Subdivision |
| Subdivision Type: | Country |
| Subdivision Name: |  Finland |
| Subdivision Type1: | Region |
| Subdivision Name1: | Uusimaa |
| Subdivision Type2: | Sub-region |
| Subdivision Name2: | Greater Helsinki |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Helsinki |
| Subdivision Type4: | District |
| Subdivision Name4: | Southeastern |
| Parts Type: | Subdivision regions |
| Parts Style: | para |
| P1: | none |
| Total Type: | |
| Area Total Km2: | 0.73 |
| Population Total: | 2,183 |
| Population As Of: | 2005 |
| Population Density Km2: | 2,990 |
| Postal Code Type: | Postal codes |
| Postal Code: | 00830 |
| Blank Name Sec1: | Subdivision number |
| Blank Info Sec1: | 44 |
| Blank1 Name Sec1: | Neighbouring subdivisions |
| Blank1 Info Sec1: | Herttoniemi Laajasalo Marjaniemi Roihuvuori Vartiosaari |
Tammisalo is a neighbourhood (number 44) and an island in eastern part of Helsinki, Finland. The population of Tammisalo is approximately 2,200 and its area is 0.73km2. The nearest districts are Herttoniemi, Roihuvuori and Laajasalo. In the Viking era the coastal waterway from Sweden to Arab world went between Tammisalo and the continent along Porolahti bay.
A particularly remarkable building in the low-rise suburb of Tammisalo is the 5-storey house called Tammelund, designed by architect Antti Rantanen (1935), which in terms of its proportions and number of windows (over 100), is regarded as a "miniature skyscraper". Tammisalo is also renowned for housing projects designed by famous modernist architect Timo Penttilä.